Very sharp geometries are at the origin of the Osaka project. We want to get an appearance of strong perceptual linearity for the backrest and the seat, bending the plywood with the smallest radius possible. This lines naturally match with the simple trapezoidal elements of the structure, only the armrest interrupts the linearity, changing rhythm. All this suggested us a Japanese atmosphere, maybe for the synthesis of the functions in a few, sober and rigorous lines. Each component expresses its function, all components are thought to be produced in a simple way, with minimal waste of material, and to be firmly assembled.